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, J. ZIMMBRM'AN au J1KUNDERD0WN- FOR FBMING TONGUBS IN BLANKS FORKEYUPBN (No Model.)

Unire *raras JOHN ZIMMERMAN AND JOHN K. UN DERDOWN OF CHICAGO, ILLINOIS,ASSIGN- ORS T THE NATIONAL KEY-OPENING CAN COMPANY, OF SAME PLACE.

PUNCH FOR FORMING TONGUES IN BLANKS FR KEY-OPENING CANS.

SPECIFICATION forming part of Letters Patent No. 504,187, dated August29, 1893.

Application iiled December 16, 1892. Serial No. 455,354. (No model.)

To all whom t may concern.:

Be it known that we, JOHN ZIMMERMAN and JOHN K. UNDERDOWN, of Chicago,in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Punches for Forming Tongues in Blanks forKey-Opening Cans; and we do hereby declare that the followingis a full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

Our invention relates to machines for cutting out the sheet metal blanksused in making what are known as key-opening cans, and more particularlyfor making that type or kind of key-opening cans which is embraced inLetters Patent No. 486,522, granted to John Zimmerman, one of theapplicants, November 22, 1892, and in Letters Patent No. 486,523, alsogranted to the said Zimmerman on the same date.

The objects of our invention are to produce mechanism by means of whichthe free lip or tongue of the blank shall be rapidly and economicallycut out of the blank, perforated and raised from the blank, and theoperation of which shall be such as to enable double quantities of thestock to be simultaneously operated upon; thereby enlarging theproductive capacity of the mechanism and still further enhancing theeconomy of production.

To the above purposes our invention consists in certain peculiar andnovel features of t construction and arrangement, as hereinafterdescribed and claimed.

In order that our invention may be fully understood we will proceed todescribe it with reference to the accompanying drawings in which- Figure1 is a vertical longitudinal section of the bed-plate of the machine andits imme# diate operative attachments, and also a front elevation,partly broken away, of the reciprocatory head of the machine and itscutting and puncturing attachments; the section being taken on theirregular line 1--1 of Fig. 2 and the direction of view being rearward,as indicated by the arrows applied to said line. Fig. 2 is a plan viewof 'the bed-plate of the machine the bed-plate being partly broken away,and the direction of view being downward, as indicated by the arrows 2applied to the horizontal broken line in Fig. l. Fig. 3 is an under sideplan view ofthe reciprocatory head of the machine and its attachments;the direction of view being upward, as indicated by the arrows 3 appliedto the horizontal broken line in Fig. l.v Fig. 4 is a transversevertical section of the 'reciprocatory head, taken on the line 4-4 ofFig. l; the direction of view being to the right, as indicated byv thearrows applied to said line. Fig. 5 is a transverse vertical section ofthe reciproca# tory head, taken on the line 5-5 of Fig. l; the directionof view being to the left, as indicated by the arrows applied to saidline. Fig. is aplan view of afragmentof the blank as it appears aftertreatment by the die at the left hand end of the reciprocatory head inFig. l. Fig. 7 is a plan View of a fragment of the blank as it appearsafter treatment by the die at the right hand end of the reciprocatoryhead in Fig. 1.

In the class of hermetically sealed cans, to the manufacture of whichour present invention relates, the body sheets of the cans are formedwith a free lip or tongue which is a prolongation of a detachable stripof the body sheet or blank, this lip or tongue lapping outside of theopposite edge of the body strip or blank and being soldered thereto,when the` can is formed up, and said lip or tongue being adapted forseizure by an implement or key, when the can is to be opened so as topermit the severance of the detachable strip from the body sheet of thecan. For a more perfect understanding of these structural features ofthe can we again refer to the said prior patents numbered 486,522 and486,523 previously mentioned. Y

In the accompanying drawings, A designates the bed-plate of the machine,this plate occupying a horizontal position and being supported by anysuitable frame-work. In this bed-plate are formed two sockets orcavities a and a. which are preferably of circular form and which arelocated one beside the other with a suitable distance between them.Within these two sockets are placed the two blocks B and B', theseblocks being tted to be supported laterally, but adapted to be deroopressed in the sockets. A suitable number of spiral springs b placed inthecavities a a below the blocks, aiord the latter suitable yieldingsupport. Upon the upper side ot the bed-plate A is placed a horizontaltop-plate C which rests directly upon the bedsplate A and which overliesthe cavities a a. Through this top-plate are formedY two openings c andc' which respectively overlie thecavities d and a of the bed-plate A andinto which proA trude extensions B2 B3 respectively of the blocks B B;these openings conforming in shape to the cavities a d of the bed-plate.Above the top-plate C is placed a horizontal spacing-plateD which isshown as of approximately T-form, the rear or body portion of the plateextendinglongitudinally of the rear partof thebed-plate A, and anextension CZ protruding forward from the middle of the spacingplate, atright angles thereto, so as to lie between the cavities a and a of thebedplate. Upon the spacing-plate D is laid a face-plate E which may beof similar shape to thatoi the bed-plate` A, and whicl1,owing to thepresence of the spacing-plate D, is separated from the bed-plate A by ahorizontal space which is centrally divided by the extension d.'lhisface plate E is formed with two apertures e and e which directlyoverliethe openings c and c respectively of the top-plateC and also thecavities or sockets a. and ct respectivelyof the" bedplate A, and whichconform in shape to s'aid openings and cavities. The top-plate C andfaceplate E are retained in position upon the' bed-plate A by anysuitable numberot` bolts F having the usual retaining nuts f. Thesprings l) normally retain theblocks B B in the elevated position withthe upper ends of the blocks pressed against the under surface of thetop-plate C and with their extensions or bosses B2 B3 within theopenings c'cot said top-plate. These bosses B2 B3 constitute dies to actin conjunction with plunger-s carried by the reciprocatory head of themachine, as hereinafter described. The left hand die B2 operates, inconjunction with the left hand plunger, to` perforate the blank, to cuttheslits at the sides of the tongue, and

to raise the latter out of the opening, the product being shown in Fig.6. In this figure G designates a fragment of the blank sheet for a canbody and g the tongue. The tongue g lieswithin the body sheet at oneedge thereof and is separated from the body sheet by two parallel slitsor cuts g the outer en ds of which are convergent, as at g2, whereforethe boss B2 is formed with two parallel sides h to make the slits' g andtwo convergent sides h2 to make the convergent portions g2 of the slits.Ahole g3 is required in the tongue g near its base, and to form saidhole the boss B2isprovided with a vertical cavity h3 to receive acorresponding punch onthe plunger. Owing tothe presence of the parallelsides h of the boss B2, said bossis of elongated form and is alsocontracted at the opposite end from that end near which thet cavity h3is formed, and the opening c and aperture e of the top-plate C andface-plate E respectively are of correspending form to that of the bossB2. In order to render the lip or tongue perfectly free at its outerend, the outer ends ot the slits g are subsequently cut away so as toform outwardly divergent margins g4, and this is accomplished by the dieB3. For this purpose the die B3 is formed at its front with twoforwardly extending triangular or wedge-shaped projections t' the outerinclined sides or edges of which merge with the outer sides of the bossor die and which serve, in conjunction with the right hand plunger, tomake the oblique cuts g4; thus removing small triangular or wedge-shapedpieces from the stock or body sheet.

J designates a suitablehead o'r carrier which is mounted above thebed-plate and cap-plate and which is intended to reciprocate Verticallyabove said plate; triangular projections j being shown at the ends ofthe' head or carrier, to work in similarly shaped guidegrooves in aframing of any suitable construction.

From the under sideot' this head or carrier ger K operates inconjunction with the die or boss B2, while the plunger L operates incon` c junction with th'e die or boss B3. The plungers K and L are shownas connected together bya coupling-plate J by which said plnngersaresteadily held in their proper working position; said coupling-platebeing formed with `an upward extension J2 entering the head J anddctachably held therein by a set-screwJ3. The lower end or face of theplunger K is inclined upwardly and forwardly and the two edges or sidesk of the plunger are formed parallel with each other so as,inconjunction with the straight parallel edgesor sides 7L of the die B2,to form the parallelcuts'g of the blank.

The rear corners of this plunger are beveled off or inclined, as at 7a2,so as, in conjunction with the inclined edges or sides h2 of the die B2,to form the oblique cuts g2 of the blank.

A stud 7c3 extends downwardly from the frontV springing of the tongueserving toicarry it out of the Vplane of the body sheet', so that itshall properly lap over the adjacent opposite edge of said body sheet.The front edge of the plunger'L is formed with two triangular forwardprojections Zthe outer margins or IIO IZO

edges of which act in conjunction with the outer margins or edges oftheprojections z' of the die B3, to form the divergent cuts g4 of theblank.

In the operation of the machineabody sheet is first inserted between thetop-plate C and face-plateE so as to overlie the cavity a and, as thehead J descends, the plunger K makes the parallel cuts g and obliquecuts g2 and also punches the hole g3, and bends the tongue, as at g4.The body sheet is now withdrawn from the machine and reversed, so thatits under surface is presented uppermost, and is thus inserted betweenthe top -plate C and face-plate E so as to overlie the cavity 0,.Meantime a fresh body sheet has been inserted between the top-plate andface-plate, and as the head J again descends, the plunger K operates asbefore, upon the fresh body sheet, while the plunger L is making thedivergentcuts g4 in the blank which had been previously operated upon bythe plunger J and die B2. Thus it will be seen that we have produced amechanism for forming key-opening can blanks which is simple in itsconstruction and direct and positive in its operation, and by means ofwhich double quantities of stock can be simultaneously handled.

We claim as our invention- 1. -A machine for forming key-opening-canblanks, comprising a pair of depressible dies formed respectively toaccord with the shape of the tongue or lip of the body sheet, and alsoto the divergent clearing-cuts of said body sheet, and a pair ofreciprocatory plungers conforming each in shape to the shape of one ofthe dies, substantially as set forth.

2. A machine for` forming key-opening-can blanks, comprising a pair ofdies one of which is formed to accord with the shape of the lip ortongue of the body sheet, and also recessed for the perforation of saidlip or tongue, and the other of which is formed to accord with thedivergent clearing-cuts of the body sheet, and a pair of reciprocatoryplungers one of which conforms in shape to the first named die and isprovided with a projection toenter the recess of the die, and the otherof which plungers is formed to accord with the shape of the second die,substantially as set forth.

3. A machine for forming key-opening-can Y or tongue of the body sheet,and the other of which is formed to accord with the divergentclearing-cuts of the body sheet, and a pair of reciprocatory plun gersone of which conforms in shape to the shape of the rst named die and hasa beveled portion to raise the lip or tongue, 4and the other plunger ofwhich 1s formed to accord with the shape of the second named die,substantially as set forth.

4. A machine for forming key-opening-can blanks, comprising a pair ofdepressible dles formed respectively to accord with the shape of thetongue or lip of the body sheet,fand also to the divergent clearing-cutsof said body sheet, a suitably apertured and recessed framing for saiddies, and a pair of reciprocatory plungers each according in shape tothe shape of one of the dies, substantially as set forth.

5. A machine for forming key-opening-can blanks, comprising a pair ofdepressible dies formed respectively to accord with the shape of the lipor tongue of the blank, and with the clearing-cuts thereof, and a pairof reciprocatory and simultaneously movable plungers according each inshape'to the shape of one of the dies, substantially as set forth.

6. A- machine for forming key-opening-can blanks, comprising a bed-platehaving a pair of recesses or cavities to receive the formingdies, atop-plate overlying the'bed-plate and apertured coincidently with saidrecesses or cavities, a face-plate overlying the top-plate and aperturedcoincidently with said topplate, and a spacing-plate interposed betweenthe top-plate and the face-plate, and springsustained die-carryingblocks placed within the cavities of the bed-plate, substantially as setforth.

In testimony that we claim the foregoing as our inventionwe affix oursignatures in presence of two witnesses.

JOHN ZIMMERMAN. JOHN K. UNDERDOWN.

Witnesses: Y

C. CLARENCE PooLE, M. E. DAYTON.

